10) After synaptic package manager has done all tasks close it and open terminal and write this command: gedit ~/.bashrc which will open .bashrc file in gedit now at the bottom of the file write following line:source /opt/tinyos-2.1.1/tinyos.sh11) Now save file ,close gedit ,close terminal & open a new terminal.If in new terminal u find following at the first line of terminal that means our tinyos is installed successfully.